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#include "color.h" |
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#include "resolu.h" |
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#include "xraster.h" |
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#include "view.h" |
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double exposure = 1.0; /* exposure compensation used */ |
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int wrongformat = 0; /* input in another format */ |
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struct { |
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int xmin, ymin, xsiz, ysiz; |
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} box = {0, 0, 0, 0}; /* current box */ |
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} |
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} |
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/* get header */ |
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getheader(fin, headline); |
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getheader(fin, headline, NULL); |
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/* get picture dimensions */ |
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if (fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR)) |
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if (wrongformat || fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR)) |
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quiterr("bad picture size"); |
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/* set view parameters */ |
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if (gotview && setview(&ourview) != NULL) |
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{ |
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static char *altname[] = {"rview","rpict",VIEWSTR,NULL}; |
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register char **an; |
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char fmt[32]; |
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if (isexpos(s)) |
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exposure *= exposval(s); |
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else |
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else if (isformat(s)) { |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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} else |
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for (an = altname; *an != NULL; an++) |
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if (!strncmp(*an, s, strlen(*an))) { |
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if (sscanview(&ourview, s+strlen(*an)) > 0) |
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sprintf(buf, "%.3f", intens(cval)/exposure); |
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break; |
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case 'l': /* luminance */ |
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< |
sprintf(buf, "%.0fn", bright(cval)*683.0/exposure); |
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> |
sprintf(buf, "%.0fL", luminance(cval)/exposure); |
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break; |
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case 'c': /* color */ |
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comp = pow(2.0, (double)scale); |
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{ |
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register unsigned short *dp; |
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register int x, err; |
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< |
int y; |
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> |
int y, errp; |
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rgbpixel *inl; |
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short *cerr; |
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for (x = 0; x < xmax; x++) { |
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if (!(x&0xf)) |
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*++dp = 0; |
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+ |
errp = err; |
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err += rgb_bright(&inl[x]) + cerr[x]; |
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if (err > 127) |
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err -= 255; |
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else |
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*dp |= 1<<(x&0xf); |
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< |
cerr[x] = err >>= 1; |
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> |
err /= 3; |
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> |
cerr[x] = err + errp; |
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} |
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} |
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free((char *)inl); |
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register int i, val; |
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|
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for (i = 0; i < 256; i++) { |
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val = pow(i/256.0, 1.0/gamcor) * 256.0; |
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> |
val = pow((i+0.5)/256.0, 1.0/gamcor) * 256.0; |
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map[0][i] = map[1][i] = map[2][i] = val; |
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} |
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} |